[PATCH v12 05/16] arm64: Add back cpu_reset routines
panand at redhat.com
Sun Nov 29 21:28:43 PST 2015
On 27/11/2015:02:19:37 PM, Marc Zyngier wrote:
> On 24/11/15 22:25, Geoff Levand wrote:
> > +ENTRY(cpu_soft_restart)
> > + mov x18, x0 // cpu_reset
> > + mov x0, x1 // el2_switch
> > + mov x1, x2 // entry
> > + mov x2, x3 // arg0
> > + mov x3, x4 // arg1
> > + ret x18
> > +ENDPROC(cpu_soft_restart)
> Grepping through the tree, I can only find a single use of
> cpu_soft_restart, with cpu_reset as its first parameter.
> Why do we need this indirection? Having
It is needed because we need to execute cpu_reset() in physical address space.
> void cpu_soft_restart(el2_switch, entry, arg0, arg1);
> should be enough...
We can do with only cpu_soft_restart(), but then a function pointer to __pa() of
it need to be called. May be current approach is more cleaner.
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